Brun Eliott, Cottinet Pierre-Jean, Pelletier Arnaud, Ducharne Benjamin
LGEF, INSA-Lyon, EA682, University Lyon, 69621 Villeurbanne, France.
CMPhy, 26 Rue Paul Sabatier, 71530 Crissey, France.
Sensors (Basel). 2023 Oct 9;23(19):8345. doi: 10.3390/s23198345.
Reliable measurements in structural health monitoring mean for the instrumentation to be set in perfect reproducible conditions. The solution described in this study consists of printing the sensors directly on the parts to be controlled. This method solves the reproducibility issue, limits human error, and can be used in confined or hazardous environments. This work was limited to eddy current testing, but the settings and conclusions are transposable to any non-destructive testing methods (ultrasounds, etc.). The first salve of tests was run to establish the best dielectric and conductive ink combination. The Dupont ink combination gave the best performances. Then, the dispenser- and the screen-printing methods were carried out to print flat spiral coils on flexible substrates. The resulting sensors were compared to flex-printed circuit boards (PCB-flex) using copper for the electrical circuit. The conductive ink methods were revealed to be just as efficient. The last stage of this work consisted of printing sensors on solid parts. For this, 20-turn spiral coils were printed on 3 mm thick stainless-steel plates. The permanent sensors showed good sensibility in the same range as the portative ones, demonstrating the method's feasibility.
结构健康监测中的可靠测量意味着仪器要在完全可重复的条件下进行设置。本研究中描述的解决方案是将传感器直接打印在待检测的部件上。这种方法解决了可重复性问题，限制了人为误差，并且可用于受限或危险环境。这项工作仅限于涡流检测，但设置和结论可移植到任何无损检测方法（超声波等）。进行了首轮测试以确定最佳的介电和导电油墨组合。杜邦油墨组合表现最佳。然后，采用点胶和丝网印刷方法在柔性基板上印刷扁平螺旋线圈。将所得传感器与使用铜制作电路的柔性印刷电路板（柔性PCB）进行比较。结果表明导电油墨方法同样有效。这项工作的最后阶段是在固体部件上印刷传感器。为此，在3毫米厚的不锈钢板上印刷了20匝螺旋线圈。永久性传感器在与便携式传感器相同的范围内表现出良好的灵敏度，证明了该方法的可行性。
